Derrick



T. 5. DE CUIR June 15, 1948.

- DERRICK 5 Sheets-Sheet 1 Filed July 17 1945 77 74 a .INVENTOR. Z?Jalfard 6105M! ATTORNEY T. 5. DE CUIR June 15, 1948.

DERRICK 5 Sheets-Sheet 2 Filed July 1"7i 1945 INVENTOR. Y'alfrd mama-ATTORNEY June 15, 1948. "r. 5. DE C UlR DERRICK 5 Sheets-Sheet 3 FiledJuly 17 1945 ATTORNEY T. 5. DE CUlR June 1 5, 1948.

DERRICK 5 Sheets-Sheet 4 Filed July 17, 1945 1 IN VEN TOR. Talfard.Sifiezar ATTORNEY T. 5. DE CUIR June 15, 1948.

DERRICK Filed July 17, 1945 MN QM 2 .4 ILHJPHIFQ... a 1 a. N. 5? %Enhlli ml (ATTORNEY Patented June 15, 1948 DERRICK Talford S. De Cuir,Whiting, Ind., assignor to The Luminous Company. New York, N. Y., acorporation of Delaware Application July 17, 1945, Serial No. 605,559

9 Claims. 1

This invention relates to derricks and, in particular, to the provisionof a new and improved derrick possessed of great versatility andefficiency, and capable of handling large, heavy, bulky objects andequipment, requiring elevation of the point from which the load line issup porteda substantial distance above the end of the derrick mast.

It is a further object of this invention to provide such a derrickstructure embodying, in addition to a conventional mast and main boom,an auxiliary boom or high boom, (preferably provided with an extensionboom or jib boom projecting therefrom) which may be elevated to highangle positions whereby the load line is supported from pointssubstantially above the upper end of the derrick mast.

It is a further object of this invention to pro vide such a derrickstructure embodying means for detachably connecting the upper endportion of the conventional main boom rigidly to the mast in such mannerthat the mast is substantially stiifened or strengthened, makingpossible operation of the high boom or auxiliary boom to handle objectswhich are too heavy to be handled by such a high boom when the mast isnot so reinforced and which objects are of such length or height as torequire that the load line be supported from points beyond the upper endof the mast.

v to

It is a further object of this invention to provide such a structurewherein the jib boom or extension boom may be adjusted to extenddownwardly at an acute angle from the outer end of the high boom in suchmanner as to engage the lower end portion of the mast when the high boomis lowered thus offsetting the outer end of the high boom from the mastin the lowered position of the high boom wherein it does not obstruct orinterfere with operation of the main boom and by means of whichoffsetting of the outer end of the high boom, at rest is off deadcenter. I

It is a further object of this invention to provide such a derrickstructure wherein means is also provided for predeterminedly maintainingthe upper block of the high boom topping lift spaced from the axis ofthe mast at such distance and in such manner as to provide sufficientleverage for operation of the topping lift to ele rate the high boomfrom its lowermost. at rest,

or inoperative position without placing undue orunusual strain on thehigh boom topping lift or the high boom lift line.

It is a further object of this invention to pro- '-vide such a derrickstructure embodying means i for predeterminedly limiting the uppermostposition of the high boom whereby to prevent it from going over backwardor swinging past dead center toward the derrick mast, i. e., beyond avertical plane passing through the hinge or axis thereof.

It is a further object of this invention to provide such structurewherein the jib boom is hingedly attached to the outer end of the highboom in such manner that it may be adjusted angularly with respectthereto.

These and other objects and advantages will appear from the followingdescription taken with the drawing.

In the drawing:

Fig. 1 is a view in elevation, and partly diagrammatic, of anillustrative derrick embodying the principles of this invention with themain boom in operation and the high boom or auxiliary boom in itslowermost, inoperative, position;

Fig. 2 is a similar view of the derrick of Fig. 1, partially brokenaway, but showing the high boom or auxiliary boom in operation, and withthe main boom connected to the derrick mast to provide for strengtheningthereof, the high boom or auxiliary boom being shown in substantiallyhorizontal position; I

Fig. 3 is a view similar toFigs. 1 and 2, of the upper end of thederrick, but showing the. extreme uppermost or high angle position ofthe high boom or auxiliary boom, with a position intermediate thepositions of Figs. 2 and 3 indicated therein in dash lines;

Fig. 4 is an enlarged detail view of the upper end of the derrick, withthe parts substantially in the position shown in Fig. 2;

Fig. 5 is a fragmentary top plan structure shown in Fig. 4;

Fig. 6 is a view similar to Fig. 4, but showing the parts substantiallyin the position shown in full lines in Fig. 3, and with the boom stop inits operative position wherein it limits the uppermost or highestposition of the high boom;

Fig. 7 is a fragmentary view of the boom block stop, and boom stop, inthe position shown in Fig. 6 with the high boomomitted in the interestof clear disclosure; and

Fig. 8 is an enlarged fragmentary detail plan view of the outer end ofthe high boom and the connected jib boom, with the latter partly brokenaway.

As shown in Figsal, 2, and 3, the mast l is of conventional form, beingpivoted to or swing-ably mounted in conventional manner On the base 2and the conventional main boom 3 being hinged -to the mast 1 adjacentits lower end in convenview of the tional manner at the point 4.Conventional means such as the bull wheel 5, operatively connected witha reversable swing engine 5, is provided for swinging the upright mast labout its vertical axis. At it upper end, the mast I is provided with apivotally attached spider 1 to which are 'secureda plurality of guysBfor maintaining the upper end'of the mast I in position.

While the above described structure is conventional, and the outer endof the main boom 3 is connected through the main boom topping lift(generally designated ID) in conventional manner to the upper end of themast i, the pivot for links 52 of the upper'block' ofthe topping liftiii is provided by a pin M secured in the head block i5 as shown inFigs. 5 and 6, and as here.- inafter more fully explained. The links 16of of the lower block of the topping lift ID are securedin conventionalmanner to the outer end of the main boom 3.

While the mast land main boom 3, as well as the high boom or auxiliaryboom (hereinafter described) are shown diagrammatically in Figs. 1, 2,and 3, the details thereof are shown in Figs. 4, 5, and 6. As hereinshown, the mast 8 comprises four similar angles I8 connected byconvention-al trusswork to form a hollow column terminating at its upperend in a headed pin it upon which the above'described spider 'i isrotatably supported. The head block l5 comprises a pair of similarobverse plate 2i welded or otherwise rigidlysecured each to a pair ofangles l8 at opposite sides of the mast I. Each plate 20 is providedadjacent each upper corner with an aperture or bore, one pair of suchapertures being aligned and havingthe above described pin 14 extendingtherethrough and secured therein against axial movement by suitableknown means such as the cotter pins Mb (Fig. 5) or the like. The otherpair of apertures or bores are aligned and provide support for the pin2i for a purpose which will hereinafter appear. Provided at its upperend with a bore or aperture aligned with the last described bore in eachplate 28, and cooperating therewith to support the pin 2!, is an angle22 having its upper end adjacent the aforesaid aperture welded orotherwise rigidly secured to the adjacent portions-of each plate 20.

These angles 22 extend downwardly at an acute angle and in spacedrelation to the adjacent upper portion of the mast, and have their lowerends welded or otherwise rigidly secured each to a high boom bearingplate 23 which is supported rigidly in outwardly spaced relation to themast by pairs of substantially horizontal angle members 24 and 25connected together and to the bearing plate 23 by a pair of upwardly andoutwardly inclined angle members 26.

The bearing plates 23 aresuitably apertured to support the pivot pin orhinge pin 21 which extends also. through suit-able apertures provided inthe hinge block 28 at the inner end of the high boom or auxiliaryboomwhich is generally designated The. high boom or auxiliary boom $6 isshown diagrammatically in Figs. 1, 2, and 3, but the details thereof areshown in F gs. 4, 6, and 8. As therein shown, it is formedconventionally by foursir'nilar. angles .3! connected by trusswork toform a hollow column, the column terminating at its inner end in theabove described hinge block 28, and at its outer end in a plate 32connected between the outer ends of the upper pair of angles 3| and apair of side plates 33 and suitable bracing.

The sheave pin 34 of the upper block of the 4 fall 35 extends throughsuitable bearing blocks provided between the angles 3-! at their outerends. A hinge pin 36 also extends through the side plates 33 andsuitable bearings pivotally to connect the jib boom or extension boom 38to the outer end of the high boom 30. Also pivoted about the pin 351s apair of carrier'brackets 39 terminating at their upper ends in ears orex tensions id provided with apertures receiving the outer ends or loopsof the stays 4| which are connected at their inner ends to the hingeblock 28 and which may comprise either cables, as shown in Fig. 8, oraplurality of rods Ma connected by turn buckles 4 l b by means of whichthe angle of brackets 39 may be varied with respect to the high boom 3!for a purpose which will hereinafter appear. s

The jib boom or extension boom 38 (Fig. 8) comprises a, pair of channels42 bent inwardly at their outer'ends and secured: together by plates 43and being apertured at their outer ends to support the pin or pintle 44which supports the pulley 45. E achof the channels 42 is rigidlyconnected to an ear of a bracket 39 by means of one of a pair of similarangles or stays 46,

each having its outer end welded or otherwise rigidly secured tonne ofthe channels 42,-an-d its inner end welded or otherwise rigidly securedto an ear ill, as showninFig. 8. Thus, theangle between the brackets 39(and cars 40 thereof): and the jib boom or auxiliary boom 38, is:alwaysmaintained constant by the rigid connecting stays MS.

Since the length of the stays 4! may be adjusted, if desired, as pointedout above, by means of the tur buckles 41b and the useof rods Ma ofvarying length-(Fig. 4), the angle between the brackets 39 and the highboom-30 may be adjusted, if desired, to vary the angularity of the jibboom or auxiliary boom '38 with respect to the high boom30.

Each side plate 33 cooperates with a similar parallel plate 33a securedto the inner sides of one pair of the angles 3| to form, by means ofaligned apertures extending through them, a seat for a pair of similarpins 58, each of which supports an end of an equalizer cable 49 whichpasses about a sheave or pulley 50 supported by the outer block 5| ofthe high boom topping lift 52. The inner block 53 of the aforesaidtopping lift 52 is pivotally secured to a bifurcated bracket 54hingedlysupported at its inner end by the above described pin 2|extending through the supporting aperturesprovided in'the members 22 andplates 20.

The means for pivotally securing the inner block ditto the bifurcatedbracket 54 comprises the extension pin 55 which in addition to forming asupport for the sheaves of the: upper block 53 of the topping lift 52,extends outwardly on both sides a substantial distance and terminates inenlarged heads 55a. to form extensions cooperating with the hereinafterdescribed boom members 55 is provided with a recess 58 which, in theoutward position of the members 56 (shown in Fig. 4)., are adapted toengage the ends of the extension pin 55 to limit downward movement ofthe bracket 54, as shown in Fig. 1. Anidler pulley 59, supported on thepintle or axle 60 adjacent the outer end of the boom block stop formedby the members 55, is adapted to engage the boom line or lift line 16which extends to the six sheave hinged tandem block of the topping lift52 in the position shown in Fig. 1. Extending outwardly from each of themembers 56 is a pair of rollers 6| which have anti-friction engagementwith the members 51 forming the auxiliary boom stop.

By means of this high boom stop, when the auxiliary boom 30 is raised tothe position shown in Fig. 3, the members 51 which have their movementconfined each by one pair of rollers 6|, define the uppermost positionof the auxiliary boom 30 and prevent it from falling over backwards ortraveling beyond dead center toward the mast l in the high liftpositions thereof.

When the auxiliary boom 30 is lowered toward, or to, the position shownin Fig. 1, the boom block stop formed by the members 56 and axle 60, byengagement of the recesses 58 with the ends of the extension pin 55,limit downward movement of the bracket 54 effectively to maintain theupper block of the top lift 52 spaced from the mast l, as shown in Fig.1.

In order to strengthen the mast l for operation of the auxiliary boom30- in high angle positions as shown in Fig. 3 wherein the auxiliary orhigh boom. portion of the derrick operates as a stiff leg derrick, astrongback or strut 52 is provided which comprises a braced structuresomewhat similar in construction to the booms 3 and 30. but whichstrongback or strut is of triangular shape in elevation, beingpermanently pivoted on a pin 63 to the above described horizontal anglemember 25, and being adapted to have the adjacent inner apex securedrigidly to the above described horizontal angle 24 by means of aremovable pin 64 provided with a cotter or key 65. At its outer apex,the strut or strong back 52 is provided with apertures receivingremovable pin 65 provided with a cotter or key 61, which pin 65 isadapted to be removably secured in an aperture provided in a bracket 58on the main boom 3, as shown in Fig. 4.

When the main boom 3 is in operation, as shown in Fig. l, the pin 64 isremoved from the apertures in the plates 24, and the strongback or strut52 swings downwardly about the pivot or pin 53 to the position shown inFig. 1, wherein it does not obstruct free movement of the main boom 3.During such operation, the auxiliary boom :38 is in its lowermostposition, and the boom block stop 56, Eliis operative to offset theupper block of the topping lift 52 from the mast R. However, when it isdesired to operate the high boom or auxiliary boom 30, especially forhigh angle lifting, the 'strongback or strut 62 is placed in theposition shown in Figs. 2, 3, 4 and 6, the pin 54 being inserted andsecured by the cotter or key 65, whereupon by means of the topping lift10, the main boom 3 is pulled up into position for the insertion of pin65 to lock the main boom 3,

the strongback or strut 52, and the mast I, into a triangular structure.Alternatively. when a single quick high angle lifting operation isperformed, the pin 55 may be left out, and the main boom raised to theposition shown in Fig. 4 by the topping lift l0, whereupon rigidsubstantially a substantial amount of strengthening of the mast l issecured.

As shown in Figs. 1 and 2, the main boom 3 is provided adjacent itsinner or lower end with an apertured bracket 69 which is adapted toreceive the hook 10 on the lower block of the fall H, to which fall themain boom load line 12 extends, the aforesaid load line I2 passing overthe pulley 13 on the mast l to the drum or nigger-head 14 on the hoistengine. Thus, in order to keep the lower block of the fall H frombecoming an obstruction in operation of the high boom 30 of the derrick,the hook 10 may be inserted in the aperture of the bracket 69 tomaintain the lower block close to the lower end of the main boom 3, asshown in Fig. 2.

Extending from the high boom fall .35 is the high boom load line 15which extends over a pulley on the mast, and down through the mast I tothe nigger-head or drum 14 to which it is connected when the main boom 3is inoperative, as shown in Fig. 2, whereupon the main boom load line I2is coiled upon the bull wheel 5, as shown in Fig. 2. When the main boom3 is to be operated, as shown in Fig. 1, the high boom load line 15 iscoiled upon the bull wheel, as shown in Fig. 1.

The high boom lift line is designated 16 and extends from the high boomtopping lift 52 over suitable pulleys down through the mast I, andthence to a nigger-head or drum 11 on the hoist engine which isdiagrammatically shown in Fig. 2. The main boom lift line is designated18 and extends over suitable pulleys and thence down through the mast Ito the nigger-head or drum 19 of the hoist engine. While varioussuitably located pulleys are shown for avoiding friction between theload lines 12 and 15 and the boom lines or lift lines 16 and 18, and themechanical parts of the derrick, these are not described since they donot constitute, per se, a part of this invention.

It is, of course, to be understood that the above description is merelyillustrative and in nowise limiting, and that I desire to comprehendwithin my invention such modifications as are comprehended within thescope of the appended claims.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. In combination with a derrick including an upright mast, a main boompivotally connected thereto adjacent its lower end, and means forelevating and lowering said boom: an auxiliary boom pivotally connectedto said mast at a high point relatively to the pivotal connectionbetween the main boom and the mast and at the opposite side of the mastfrom the main boom, means for raising and lowering said auxiliary boomindependently of the rasing and lowering of said main boom, and meansdetachably connectiblc between said mast and said main boom andconstructed to form together with the main boom 2. structure for bracingsaid mast for high angle operation of said auxiliary boom.

2. In combination with a derrick including an upright pivotallysupported mast, a main boom hinged thereto adjacent its lower end, andmeans for raising and lowering said boom; an auxiliary boom hinged onsaid mast adjacent the upper end of said mast at the side thereofopposite said main boom, means'for raising and lowering said auxiliaryboom independently of said main boom and means cooperating with saidmain boom for bracing said mast for high angle operation of saidauxiliary boom comprising a linkage de- 7 tachably' connectibl'e betweensaid mast and the upper end of said main boom for forming together withthe mast and the main boom a rigid triangular upright structuresupporting said auxiliary' boom.

3, In a derrick, an'uprightv mast, a main boom hinged to said mastadjacent its lower end, means for elevating and lowering said boom, anauxiliary boom pivotally connected to said mast adjacent the upper endof said 'mast at the side thereof opposite said main boom, means forraising and lowering said auxiliary boom independently of said main boomandmeans cooperating with said main boom for bracing said mast for highangle operation of said auxiliary boom comprising a linkage detachablyconnectible betweensaid mast and the upper end of said main boom at ahigh angle elevation of the latter for forming together with the mainboom and the mast a rigid tri angular upright structure supporting saidauxil iaryboom.

4. In a derrick, a mast constantly supported upright, a main boompivotally secured thereto at one side adjacent the lower end thereof,means for raising andlowering said main boom, means for detachablyconnecting the upper end portion of said main boom in anel'evated'position of the latter to saidmast and constructed to formtogether with the mast and the main boom a rigid inverted triangularstructure, an auxiliary boom pivotallyattached: to said mast at itsopposite side adjacent its. upper end, means for raising and loweringsaid auxiliary boom independently of said main boom,- and means forlimiting the upward angular movement of said auxiliary boom with respectto said mas-t for preventing it from passing dead center.

5. In a derrick'including an upright mast, a main boom hinged theretoadjacent its lower end and means for elevating and lowering said mainboom; an auxiliary boom pivotally connected to said mast adjacent theupper end of said mast at the side thereof opposite said main boom,means for raising and lowering said auxiliary boom independently of saidmain boom comprising a topping lift including a pair of blocks one ofwhich is connected swingably in spaced relation to said mast, meanscooperating with said last named block in the inoperative position ofthe auxiliary boom to maintain said block spaced from the plane of saidauxiliary boom to provide purchase for further operation of saidauxiliary boom, and means detachably connectible between and cooperablewith said mast and said main boom for bracing said mast for high angleoperation of said auxiliary boom.

6. In a derrick including a mast constantly supported upright, a mainboom hinged thereto adjacent its lower end and means for elevating andlowering said boom an auxiliary boom pivotally connected to said mastadjacent the upper end of said mast at the side thereof opposite saidmain boom, means for raisingand'lowering said auxiliary boomindependently of said main boom comprising a topping lift including apair of blocks one of which'is connected swingably in spaced relation tosaid mast, means cooperating with said last named block in theinoperative position of the auxiliary boom to maintain said block spacedfrom the plane of said auxiliary boom to provide purchase for furtheroperation of said auxiliary boom-means comprising a boom stopforlimiting the high angle position of: said auxiliary boom and preventinit from travellin beyond dead center, and means; connectible be tweenand cooperable with said mast and said main boom when inoperative forbracing said mast for high angle operation of said auxiliary boom.

7'. In a derrick, an upright 'mast, a main boom hingedly connected tosaid mast adjacent the between a pendent inoperative positionendanoutwardly extending operative position and detachably conneotibl'eat its. outer end with the main boom in an elevated position of thelatter to form, together with the main boom and-the mast, a rigidtriangular upright structure sup-. porting the auxiliary boom.

8. In a derrick, a mast constantly supported upright, a high boompivotally connected to said mast at a high point of the latter, meansfor'raising and lowering said boom comprising a. toppingl-ift includinga pair of blocks one of which is, com nected swingably in spacedrelation to the mast, a strut pivotally connected to the mastand en!gageable with the last-named block theinoperative position of said boomto maintain said block spaced from the plane of said boom. to provide apurchase for further operation of the boom, a strut pivotally connectedto the mast at a point above the pivotal connection of the first-momstionedstrut and engageable with said boom to limit the high angleposition thereof and prevent it from passing dead center, and meansborne by one of said struts and engaging the other strut to support bothstruts in operative position and permit limit-ed relativemovementtherebetween.

9. In a derrick, an uprightmast supported for turning on an uprightaxis, a main boom pivotally secured to said mast at one side of the mastat a relatively low point of the latter, ,means' for raising andlowering said boom, means for detachably connecting the outer endportionof' said main, boom to the mast, said connecting means beingconstructed to form, together with said mast and main boom, a rigidtriangularstrucrture, an auxiliary boom pivotally attached to said mastat a high point relatively to the pivotal con-- nection between the mainboom andthe mast and at the opposite side of the mast from the main boomand means for raising and lowering said auxiliary boom independently ofthe raising and lowering ofsaid main boom.

TALFORD S. DE' CUIR.

REFERENCES. CITED.

UNITED; STATES, PATENTS,

Number Name I Date 69,375 VanVoorhis 0ct..I, 1867 315,109 Ball- Apr. 7,1885 1,411,295 Nielsen Apr. 4, 1922 1,920,370 Forsythe et a1. Aug. 1,1933 1,923,780 Faure et a1. -A11g'.22, 1933 2,031,549 Ruff Feb. 18, 19362,378,254 Swaney June 12, 1945 2,397,271 Ladw-ig Mar. 26,1946 2.,1l t5 9

